#4463D8

CSS

:root {
  --savoy-blue: #4463d8;
  --savoy-blue-rgb: 68 99 216;
  --savoy-blue-oklch: oklch(0.543 0.183 268.5);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(227 65% 56%);
  border-color: oklch(0.543 0.183 268.5);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #4463d8;
  --color-savoy-blue-50: #e1f3ff;
  --color-savoy-blue-100: #d0e6ff;
  --color-savoy-blue-200: #b6d0ff;
  --color-savoy-blue-300: #94b1ff;
  --color-savoy-blue-400: #7196ff;
  --color-savoy-blue-500: #5579fd;
  --color-savoy-blue-600: #4867d5;
  --color-savoy-blue-700: #3952ac;
  --color-savoy-blue-800: #253c81;
  --color-savoy-blue-900: #182a5b;
  --color-savoy-blue-950: #0a173e;
}

SCSS

$savoy-blue: #4463d8;
$savoy-blue-rgb: 68, 99, 216;
$savoy-blue-light: mix(#fff, $savoy-blue, 20%);
$savoy-blue-dark: mix(#000, $savoy-blue, 20%);

.element {
  color: $savoy-blue;
  box-shadow: 0 0 0 2px rgba($savoy-blue, 0.35);
}